I'm with Hawg, I don't think that a modern powder thrower is going to load up the case properly. I suppose that if you could rig up some kind of drop tube and stand for the thrower, you could get it to work. We know that static won't set black powder off.
I load mine on a turret press and just pull the case out right before seating the bullet and add powder.
Well we don't rent pigs and I figure it's better to say it right out front because a man that does like to rent pigs is... he's hard to stop - Gus McCrae